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. 2022 Aug 26;42(7):1897–1911. doi: 10.1148/rg.220045

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US images of lymph node morphology classified according to the system of Bedi et al (21). (A) Type 1 has a very thin almost imperceptible cortex (arrow). (B) Type 2 has a cortex of 3 mm or less. (C) Type 3 has a diffusely thickened cortex greater than 3 mm. (D) Type 4 has a lobulated cortex (arrows). (E) Type 5 has eccentric cortical thickening or focal lobulation with displacement of the fatty hilum. (F) Type 6 has a completely effaced fatty hilum. — US images of lymph node morphology classified according to the system of Bedi et al (21). (A) Type 1 has a very thin almost imperceptible cortex (arrow). (B) Type 2 has a cortex of 3 mm or less. (C) Type 3 has a diffusely thickened cortex greater than 3 mm. (D) Type 4 has a lobulated cortex (arrows). (E) Type 5 has eccentric cortical thickening or focal lobulation with displacement of the fatty hilum. (F) Type 6 has a completely effaced fatty hilum.